Trator of said beard



(NovMo deL) w. T. BEARD, Decd.

J. Mummy, Administrator. EXPANDING REAMBR.

No. 589,067. Patented Aug. 31. 1897.

Query m NITED TATES' LATENT OFFIC WVILLIAM THOMAS BEARD, OF BOISE,IDAHO; JOHN MALONEY ADMINIS- TRATOR OF SAID BEARD, DECEASED.

EXPANDING REAM ER.

SPECIFICATION forming part of Letters PatentNo. 589,067, dated August31, 1897. Application filed April 6, 1397. Serial No. 631,007. (Nomodel.)

To all whom it Jar/cry concern.-

Be it known that I, WILLIAM THOMAS BEARD, a citizen of the UnitedStates, residing at Boise city, in the county of Ada and State of Idaho,have invented certain new and useful Improvements in Expanding Ream ers;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention has relation to improvements in expanding reamers, andwhile primarily intended for reboring shotguns is likewise adapted foruse wherever a reamer of this class is needed; and the object is toprovide a simple, efficient, and durable tool of this class.

To this end the novelty consists in the construction, combination, andarrangement of the same, as will be more fully described hereinafter,and particularly pointed out in the claims.

In the accompanying drawings the same reference-characters indicate thesame parts of the invention.

Figure 1 is a perspective View of my improved expanding reamer. Fig. 2is a longitudinal section of the same. Fig. 3 is a transverse section onthe line of one of the adj u-sting-screws,and Fig. 4is a similar viewthrough the central guide-lug.

1 represents the cylindrical shank, formed integral with thelongitudinal and approximately semicircular fluted bar 2.

3 represents the movable or adjustable semicircular fluted bar, securedto the bar 2 by the adjusting-screws 4 4.

5 represents a radial rectangular guide-slot formed in. the shank 1,which receives the correspondingly-formed tongue 6 on the end of theadjustable bar 3,and 7 represents a rectangular guide-slot formed in theend of the bar 2, which receives the integral guide-tongue 8 on thecontiguous end of the adjustable bar 3.

9 represents a longitudinal guide recess formed about midway in theplaneface 10 of the bar 2, and 12.represents an integral guide- 1ug onthe contiguous plane face 13 of the bar 3.

The adj usting-screws 4 4 are each provided with a collar 14 and anannular groove 15, into which projects the conical end 16 of theretaining-screws 17 to'secure said adj ustingscrews in place in themoyable bar 3 and at the same time permit their free rotation withoutallowing any end play. As will be seen, these screws 4 4 provide for theparallel ad-. justment of the movable bar 3 with reference to the fixedbar 2.

It will be understood by those familiar with this art that the flutedbar 2 and the adj ustable fluted bar 3 are formed withthe usuallongitudinal cutting edges 18 and 19,.Which conform to the correspondingcutting edges of the solid fluted reamer.

Although I have specifically described the construction and relativearrangement of the several elements of my invention, I do not desire tobe confined to the same, as such changes or modifications may be made asclearly fall within the scope of my invention without departing from thespirit thereof.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. An expanding reamer comprising the solid cylindrical shank 1, theintegral fluted bar 2, provided with the guide-slots 5 and 7, incombination with the movable fluted bar 3, formed with the integralguide-tongues 6 and 8, and adjusting-screws 4 4 adapted to adjustablysecure said bar 3 to the stationary bar 2, substantially as shown anddescribed.

2. An expanding reamer, comprising the cylindrical shank 1, providedwith the integral fluted bar 2, having the guide-slots 5 and 7 and thecentral guide-recess 9, and the parallel fluted bar 3, formed with theintegral -guide-tongues 6 and 8 on its outer ends and with the centralguide-lug 10, in combination with the adjusting-screws 4 4, providedwith the integral collars 14 and grooves 15, and the retaining-screws 17formed with conical ends 16 projecting radially into the groove in saidadj Listing-screws, substantially as shown and described. I

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

WILLIAM THOMAS BEARD. \Vitnesses: I

T. D. CAHALAN, JoNAs W. BROWN.

